| abstract |
A turf watering control system is provided for automatically watering selected areas of turf according to a preselected plan, which system includes a master control station and a plurality of spaced slave stations each connected to the master station by a power line, a source of operating electric power applied to said master control station, a plurality of sprinkler valves spaced from each slave station, connections between said valves and each said slave station whereby said valves are selectively opened and closed, an encoder source of radio frequency in said master control station applied to said power lines, decoder means at each of said slave stations, means at said slave stations actuated by said decoder means to energize the connections to said sprinkler valves and means at the master station selectively energizing the encoder means whereby a selected signal is transmitted to selected decoder means through said power lines. |